AutoCodes – GMC – P159D GMC

P159D GMC Code - Power Take-Off Remote Mode Switch Circuit

Quick Answer

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P159D GMC indicates Power Take-Off Remote Mode Switch Circuit.
Common causes: Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 453

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P159D GMC Description

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. The PTO system specifically controls engine speed to values higher than normal base idle, PTO load relay engagement, and remote starting and shutdown of the engine. When the operator requests PTO using either the PTO switch or PTO remote, the engine RPM will increase to a default standby speed. The Engine Control Module (ECM) converts the data from the engine speed sensor to a 2 pulses/engine revolution signal. When PTO is engaged, the Power Take-Off Module (PTOM) sends a GMLAN serial data message to the ECM requesting engine speeds, in response to signals from the PTO switch or remote.
The Diagnostic Trouble Code (DTC) will be set when the Power Take-Off Control Module detects a signal mismatch between the remote engine shut-off signal and the PTO engine shutdown signal.

OBDII Code P159D GMC - Power Take-Off Remote Mode Switch Circuit - AutoCodes.com — P159D GMC Code - Power Take-Off Remote Mode Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P159D GMC?

Faulty Power Take-Off (PTO) Control Module
Power Take-Off Control Module harness is open or shorted
Power Take-Off Control Module circuit poor electrical connection

How to Fix the DTC P159D GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P159D GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific GMC Models

P159D 2014 GMC Sierra — Power Take-Off Remote Mode Switch Circuit
P159D 2015 GMC Sierra — Power Take-Off Remote Mode Switch Circuit
P159D 2016 GMC Sierra — Power Take-Off Remote Mode Switch Circuit
P159D 2017 GMC Sierra — Power Take-Off Remote Mode Switch Circuit
P159D 2018 GMC Sierra — Power Take-Off Remote Mode Switch Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P159D GMC Code

1. What are the common symptoms of OBDII code P159D GMC (Power Take-Off Remote Mode Switch Circuit)?

The common symptoms of code P159D may include issues with engaging or disengaging the power take-off (PTO) system, rough idling, and decreased fuel efficiency.

2. What are the possible causes of OBDII code P159D GMC?

Possible causes of code P159D include a faulty remote mode switch, damaged wiring or connectors in the circuit, or a malfunctioning PTO control module.

3. How can I diagnose the OBDII code P159D in my GMC vehicle?

Diagnosing code P159D typically involves performing a thorough inspection of the remote mode switch, checking the wiring and connectors for any damage, and using a diagnostic scanner to retrieve and interpret trouble codes.

4. Can I continue driving my GMC with OBDII code P159D present?

It is not recommended to drive your vehicle with an active OBDII code like P159D, as it can lead to further damage or safety concerns related to the power take-off system.

5. How serious is OBDII code P159D GMC?

While code P159D may not always indicate a critical issue, it should be addressed promptly to ensure the proper functioning of the power take-off system in your GMC vehicle.

6. How can I repair OBDII code P159D in my GMC?

Repairing P159D may involve replacing the remote mode switch, repairing or replacing damaged wiring or connectors, or reprogramming the PTO control module, depending on the specific cause of the issue.

7. Is it possible to reset OBDII code P159D without repairs?

Resetting the trouble code without addressing the underlying issue may temporarily clear the code, but it is likely to reappear until the root cause is fixed.

8. Are there any DIY tips for troubleshooting OBDII code P159D in a GMC?

DIY troubleshooting tips for code P159D include visually inspecting the remote mode switch and associated wiring, checking for loose connections, and ensuring proper grounding in the circuit.

9. Can a mechanic help me fix OBDII code P159D in my GMC?

Yes, a qualified mechanic with experience in diagnosing and repairing OBDII codes can help you identify the cause of P159D and perform the necessary repairs to resolve the issue.

10. How much can I expect to pay to fix OBDII code P159D in my GMC?

The cost of repairing code P159D can vary depending on the specific cause of the issue, the needed parts, and labor rates. It's recommended to get a diagnosis from a mechanic to receive an accurate estimate.